man/sd_booted.xml

   1 <?xml version='1.0'?> <!--*-nxml-*-->
   2 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
   3   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
   4
   5 <!--
   6   SPDX-License-Identifier: LGPL-2.1+
   7 -->
   8
   9 <refentry id="sd_booted"
  10   xmlns:xi="http://www.w3.org/2001/XInclude">
  11
  12   <refentryinfo>
  13     <title>sd_booted</title>
  14     <productname>systemd</productname>
  15
  16     <authorgroup>
  17       <author>
  18         <contrib>Developer</contrib>
  19         <firstname>Lennart</firstname>
  20         <surname>Poettering</surname>
  21         <email>lennart@poettering.net</email>
  22       </author>
  23     </authorgroup>
  24   </refentryinfo>
  25
  26   <refmeta>
  27     <refentrytitle>sd_booted</refentrytitle>
  28     <manvolnum>3</manvolnum>
  29   </refmeta>
  30
  31   <refnamediv>
  32     <refname>sd_booted</refname>
  33     <refpurpose>Test whether the system is running the systemd init system</refpurpose>
  34   </refnamediv>
  35
  36   <refsynopsisdiv>
  37     <funcsynopsis>
  38       <funcsynopsisinfo>#include &lt;systemd/sd-daemon.h&gt;</funcsynopsisinfo>
  39
  40       <funcprototype>
  41         <funcdef>int <function>sd_booted</function></funcdef>
  42         <paramdef>void</paramdef>
  43       </funcprototype>
  44     </funcsynopsis>
  45   </refsynopsisdiv>
  46
  47   <refsect1>
  48     <title>Description</title>
  49     <para><function>sd_booted()</function> checks whether the system
  50     was booted up using the systemd init system.</para>
  51   </refsect1>
  52
  53   <refsect1>
  54     <title>Return Value</title>
  55
  56     <para>On failure, this call returns a negative errno-style error
  57     code. If the system was booted up with systemd as init system,
  58     this call returns a positive return value, zero otherwise.</para>
  59   </refsect1>
  60
  61   <refsect1>
  62     <title>Notes</title>
  63
  64     <xi:include href="libelogind-pkgconfig.xml" xpointer="pkgconfig-text"/>
  65
  66     <para>Internally, this function checks whether the directory
  67     <filename>/run/systemd/system/</filename> exists. A simple check
  68     like this can also be implemented trivially in shell or any other
  69     language.</para>
  70   </refsect1>
  71
  72   <refsect1>
  73     <title>See Also</title>
  74     <para>
  75       <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
  76       <citerefentry><refentrytitle>sd-daemon</refentrytitle><manvolnum>3</manvolnum></citerefentry>
  77     </para>
  78   </refsect1>
  79
  80 </refentry>